GMSgrowsanswered grow question 4 years ago Hey friend, if all looks good, dont be adding anything. You only add cal/mg if you see they need it, but you need to know if they need it or something else is causing those elements from being available. If you see problems, check your runoff ph and ec levels and make sure your proper on those levels. If everything looks good and you see cal/mg deficiency starting in the leaves, then you need to add a little. Never react to leaf problems until you know what's going on in the root system. Cheers friend